<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
 <div id="app">
   <label for="man">
     <input type="radio" id="man" value="男" v-model="sex" />男
   </label>
   <label for="woman">
     <input type="radio" id="woman" value="女" v-model="sex" />女
   </label>
   <h2>您选择的性别是:{{sex}}</h2>
  </div>


     <script src="js/vue.js"></script>
     <script>
       const app=new Vue({
         el: '#app',
         data: {
           message:'你好vue',
           sex:'男',
         }
       })
     </script>
</body>
</html>